Toyota Tundra. Manual — part 701

Fig. 5: Identifying Main Body ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Disconnect the DA, DB, DD and J4 ECU connectors.

b. Measure the voltage and resistance according to the value(s) in the table below.

MAIN BODY ECU TERMINALS VOLTAGE CHART

Terminal No.

Wiring Color

Terminal Description

Condition

Specified

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra

If the result is not as specified, there may be a malfunction on the wire harness side.

c. Reconnect the ECU connectors.

d. Measure the voltage according to the value(s) in the table below.

MAIN BODY ECU TERMINALS VOLTAGE CHART

(Symbols)

Condition

DA-1 (ACC) - Body

ground

B - Body

ground

ACC power supply

Always

11 to 14 V

DA-1 (IG) - Body

ground

B - Body

ground

IG power supply

Always

11 to 14 V

DA-1 (ALTB) - Body

ground

B - Body

ground

+B power supply

Always

11 to 14 V

DB-13 (BECU) -

Body ground

GR - Body

ground

BECU power supply

Always

11 to 14 V

DD-62 (GND1) -

Body ground

W-B - Body

ground

Body ground

Always

Below 1 ohms

DD-62 (GND2) -

Body ground

W-B - Body

ground

Body ground

Always

Below 1 ohms

J4-16 (HCTY) - Body

ground

V - Body

ground

Engine hood courtesy
switch signal

Engine hood
closed

10 kohms or

higher

Engine hood

open

Below 1 ohms

Terminal No.

(Symbols)

Wiring

Color

Terminal

Description

Condition

Specified

Condition

J1-4 (IND) -

Body ground

P - Body

ground

Security indicator
signal

Security indicator illuminates
(illuminates only for 60 sec. in
alarm sounding state (it is blinking
when system is in armed state))

3 to 5V

J1-6 (SH) -

Body ground

W - Body

ground

Security horn signal

Armed state

Below 1 V

Security horn is sounding (theft

deterrent system is in alarm

sounding state)

Pulse
generation

J2-4 (HAZ) -
Body ground

O - Body

ground

Hazard warning
light signal

Armed state

Below 1 V

System is in alarm sounding state

Pulse
generation

J4-17 (GBS)* -

Body ground

L - Body

ground

Glass breakage
sensor ECU signal

Armed state

Below 1 V

Glass breakage sensor ECU signal

system is in alarm sounding state

Pulse
generation

DB-1 (HORN)

- Body ground

V - Body

ground

Horn signal (low
pitched and high
pitched)

Armed state

Below 1 V

Horn is sounding

11 to 14 V

HINT:

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra

If the result is not as specified, there may be a malfunction on the wire harness side, or the glass
breakage sensor ECU may have a malfunction.

DTC CHECK / CLEAR

1. CHECK DTC

a. Connect Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the tester on.

d. Enter the following menus:

Techstream - Select: Body / Main Body / Trouble Codes.

e. Read the DTCs.

2. CLEAR DTC

a. Connect Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the tester on.

d. Enter the following menus:

Techstream - Select: Body / Main Body / Trouble Codes.

e. Erase the DTCs.

DATA LIST / ACTIVE TEST

1. DATA LIST

HINT:

Using Techstream to read the Data List allows the values or states of switches, sensors, actuators and
other items to be read without removing any parts. This non-intrusive inspection can be very useful
because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading
the Data List information early in troubleshooting is one way to save diagnostic time.

a. Connect Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the tester on.

*: w/ Glass Breakage Sensor

NOTE:

In the table below, the values listed under "Normal Condition" are
reference values. Do not depend solely on these reference values when
deciding whether a part is faulty or not.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra

d. Enter the following menus:

Techstream - Select: Body / Main Body / Data List.

e. According to the display on the tester, read the "Data List".

Techstream

Main Body

TECHSTREAM MAIN BODY CHART

2. ACTIVE TEST

HINT:

Using Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated
without removing any parts. This non-intrusive functional inspection can be very useful because
intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests
early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while
performing Active Tests.

a. Connect Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the tester on.

d. Enter the following menus:

Techstream - Select: Body / (desired system) / Active Test.

e. According to the display on the tester, perform the "Active Test".

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

Hood Courtesy

Switch

Engine hood courtesy switch /
ON or OFF

ON: Engine hood is
open
OFF: Engine hood is
closed

-

IG SW

Ignition switch / ON or OFF

ON: Ignition switch
ON
OFF: Ignition switch
OFF

-

Glass Break Sensor

Detection*

Glass breakage sensor
detection / ON or OFF

ON: Glass breakage
sensor ON
OFF: Glass breakage
sensor OFF

-

HINT:
*: w/ Glass Breakage Sensor

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra